221098159 has 2 divisors, whose sum is σ = 221098160. Its totient is φ = 221098158.

The previous prime is 221098153. The next prime is 221098181. The reversal of 221098159 is 951890122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221098159 - 2³ = 221098151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221098151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110549079 + 110549080.

It is an arithmetic number, because the mean of its divisors is an integer number (110549080).

Almost surely, 2^221098159 is an apocalyptic number.

221098159 is a deficient number, since it is larger than the sum of its proper divisors (1).

221098159 is an equidigital number, since it uses as much as digits as its factorization.

221098159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 221098159 is about 14869.3698252481. The cubic root of 221098159 is about 604.6838582340.

The spelling of 221098159 in words is "two hundred twenty-one million, ninety-eight thousand, one hundred fifty-nine".